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Accounts Receivable and Allowance for Doubtful Receivables - Allowance for Doubtful Receivables (Detail) - USD ($)
$ in Thousands
12 Months Ended
Feb. 29, 2016
Feb. 28, 2015
Feb. 28, 2014
Receivables [Abstract]      
Balance at beginning of period $ 3,559 $ 3,672 $ 3,952
Bad debt expense 1,132 1,326 3,024
Recoveries 169 60 42
Accounts written off (1,232) (1,499) (3,346)
Balance at end of period $ 3,628 $ 3,559 $ 3,672